In what 1987 film did Madonna play the character Nikki Finn, a street-smart woman who is falsely accused of murder and sent to jail for four years?

Explanation

The "Who's That Girl World Tour" (1987) is the second concert tour by American singer-songwriter Madonna. It was also her first world tour. The tour supported her third studio album, "True Blue" (1986), as well as the soundtrack "Who's That Girl" (1987). Madonna's 1987 film "Who's That Girl" was a box office failure, but its soundtrack proved to be a commercial success.